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Polarities of Solvents

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Polarity indexes of solvents which are commonly used for SEC analysis is shown below.

Solvent chemical formula δ P'
Cyclohexane C6H12 8.2 -0.2
n-Hexane CH3(CH)3 7.3 0.1
Carbon tetrachloride CCl4 8.6 1.6
Isopropyl ether (CH3)2CHOCH(CH3)2 7.0 2.4
Toluene C6H5CH3 8.9 2.4
Dichloromethane CH2Cl2 9.6 3.1
Dichloroethane CH2ClCH2Cl 9.7 3.5
Isopropyl alcohol CH3CH(OH)CH3 10.2 3.9
THF C4H8O 9.1 4.0
n-Propanol CH3CH2CH2OH - 4.0
Chloroform CHCl3 9.3 4.1
Ethanol C2H5OH 11.2 4.3
Ethyl acetate CH3COOC2H5 8.6 4.4
Methyl ethyl ketone CH3COC2H5 - 4.7
Dioxane C4H8O2 9.8 4.8
Acetone CH3COCH3 9.4 5.1
Methanol CH3OH 12.9 5.1
Acetonitrile CH3CN 11.8 5.8
Acetic acid CH3COOH 12.4 6.0
Dimethylformamide (CH3)2NOCH 11.5 6.4
Ethylene glycol HOCH2CH2OH 14.7 6.9
Dimethylsulfoxide (CH3)2SO 12.8 7.2
Water H2O 21.0 10.2

δ : Solubility parameter
P' : Rohrschneider's polarity parameter

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